The 34th Darwin College Lecture Series, held in 2019, addressed Vision. The aim of these lectures, as with all the Darwin College Lectures, was to provide an interdisciplinary study. The lectures range widely: they survey the mechanisms of visual perception, and the evolution of eyes; they address the mental processes underpinning vision, and the nature and significance of private visions and hallucinations; they explore the vision and imagery of artists and of scientists in their endeavours to elucidate the world. The discussions encompass astronomical observation, which enables us to look back over the evolution of the Universe to the earliest epochs, and they extend to foresight, with a vision of a digital future. We conclude this volume with a review of the current developments of computer vision, which increasingly underpin our day-to-day experience of surveillance and of automation.